Operational Research in Agriculture and Tourism: 7th International Symposium and 29th National Confe

Agricultural Cooperatives and Acceptance of Technological Innovation.- Virtual Incubators and Online Business Tools for Agro-food SMEs .- Design of a Sentiment Lexicon for the Greek Food and Beverage Sector.- Firms' Profitability in the Period of Crisis.- Fiscal Multipliers Under Extreme Uncertainty: Case of Greek Tourism Economy.- Forecasting Tourism Demand in Europe.- The Role of Modern Ports and Marine Protected Areas in Eastmed's Environmental Sustainability. The Case of Greece.- A Hybrid Firefly Algorithm Based on Coordinates for the Prize- Collecting Vehicle Routing Problem.- Green Supplier Evaluation and Selection: An Updated Literature Review.- A Similarity Hybrid Harmony Search Algorithm for the Orienteering Problem.